# Rotate image with OpenCV in Python

## Python OpenCV – Rotate Image

To rotate an image by 90 degrees, 180 degrees, or 270 degrees, with OpenCV in Python, you can use cv2.rotate() function.

In this tutorial, you will learn how to use cv2.rotate() function to rotate a given image by a specific angle.

### Syntax of cv2.rotate()

The syntax of cv2.rotate() function is

``rotate(src, rotateCode)``

where

## Steps to rotate an image

2. Rotate the image (2D array) by 90 degrees, 180 degrees, or 270 degrees, using cv2.rotate() function with the respective rotate code. The function returns the rotated image (2D array).
3. Save the rotated image using cv2.imwrite() function.

## Examples

In the following examples, we take an image, an rotate it to 90, 180, or 270 degrees.

The input image `test_image_house.jpg` we are taking is shown below.

### 1. Rotate image by 90 degrees clockwise

In the following program, we take an image `test_image_house.jpg`, rotate this image by 90 degrees, then save the rotated image to `rotated_image.jpg`.

Python Program

``````import cv2

# Rotate the image by 90 degrees clockwise
rotated_img = cv2.rotate(img, cv2.ROTATE_90_CLOCKWISE)

# Save rotated image
cv2.imwrite('rotated_image.jpg', rotated_img)``````

rotated_image.jpg

### 2. Rotate image by 180 degrees

In the following program, we rotate the image `test_image_house.jpg` by 180 degrees. Since, it is 180 degrees, both clockwise or counterclockwise would be same.

Python Program

``````import cv2

# Rotate the image by 180 degrees
rotated_img = cv2.rotate(img, cv2.ROTATE_180)

# Save rotated image
cv2.imwrite('rotated_image.jpg', rotated_img)``````

rotated_image.jpg

### 3. Rotate image by 270 degrees clockwise

In the following program, we rotate the image `test_image_house.jpg` by 270 degrees clockwise, or 90 degrees counterclockwise.

Python Program

``````import cv2

# Rotate the image by 90 degrees counterclockwise
rotated_img = cv2.rotate(img, cv2.ROTATE_90_COUNTERCLOCKWISE)

# Save rotated image
cv2.imwrite('rotated_image.jpg', rotated_img)``````

rotated_image.jpg

## Summary

In this Python OpenCV Tutorial, we have seen how to rotate an image by 90 degrees, 180 degrees, or 270 degrees using cv2.rotate() function.

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